Corrosion-resistant high-temperature heating device

Abstract

The application discloses a kind of corrosion-resistant high-temperature heating devices, it relates to material processing technical field, including: heating ring, at least two hollow circular table are equipped in heating ring, heating ring and several hollow circular table are equipped with heating device, the inner surface of heating ring is coated with silicon carbide coating, the inner surface and outer surface of hollow circular table are provided with silicon carbide coating, boron nitride coating is further equipped on silicon carbide coating, the outer surface of heating ring is coated with thermal barrier coating;At least three supporting blocks are equipped below heating ring, heat insulation plate is equipped below supporting block, at least three hydraulic cylinders are equipped below heat insulation plate;Further including control box, control box controls the output length of hydraulic cylinder.The heating ring of the application can prevent corrosion at the same time make the loss less when heating, service life is longer.

Description

Technical Field

[0001] This invention belongs to the field of material processing technology, specifically a corrosion-resistant high-temperature heating device. Background Technology

[0002] A heating furnace is a device used to heat materials or workpieces to rolling or forging temperatures. Heating furnaces are widely used in many industries such as metallurgy and machinery. When heating certain materials, corrosive gases (such as chlorine) may be generated. Currently, heating furnaces used by various manufacturers generally suffer from problems such as lack of corrosion prevention, uneven heating, and inability to maintain temperature for extended periods. Summary of the Invention

[0003] The purpose of this invention is to provide a corrosion-resistant high-temperature heating device to solve at least one aspect of the problems and defects mentioned in the background art.

[0004] According to one aspect of the present invention, a corrosion-resistant high-temperature heating device is provided, comprising: a heating ring, wherein at least two hollow frustums are provided inside the heating ring, and heating devices are provided inside the heating ring and the plurality of hollow frustums, wherein a silicon carbide coating is provided on the inner surface of the heating ring, and both the inner and outer surfaces of the hollow frustums are coated with a silicon carbide coating, wherein a boron nitride coating is further provided on the silicon carbide coating, and a thermal barrier coating is provided on the outer surface of the heating ring;

[0005] At least three support blocks are provided below the heating ring, a heat insulation plate is provided below the support blocks, and at least three hydraulic cylinders are provided below the heat insulation plate;

[0006] It also includes a control box that controls the output length of the hydraulic cylinder.

[0007] According to an exemplary embodiment of the present invention, the heating ring is a high-temperature alloy heating ring. Since the high-temperature alloy has a high melting point, the heating ring can withstand a high temperature. The high-temperature alloy has good thermal conductivity, which makes the heating ring have high thermal conductivity and low energy consumption.

[0008] According to another exemplary embodiment of the present invention, the top surface of the heating ring is provided with an air outlet, the air outlet is provided with an exhaust pipe, and the end of the exhaust pipe is provided with an exhaust fan, which facilitates the discharge of the gas generated during heating from the heating ring, and can avoid problems such as explosion caused by thermal expansion and contraction. It can also prevent the silicon carbide coating from reacting with oxygen at high temperature to generate silicon dioxide and carbon dioxide, thereby causing the coating to lose its original function and reducing the heating efficiency of the device.

[0009] According to another exemplary embodiment of the present invention, the top surface of the heating ring is provided with a feed inlet, the bottom surface of the heating ring is provided with a discharge outlet, and a baffle is provided between the feed inlet and the discharge outlet to facilitate simultaneous feeding and slag discharge, thereby improving the heating efficiency of powdery materials; the baffle enables the material to move in a set direction, resulting in better uniformity of final material heating.

[0010] According to another exemplary embodiment of the present invention, the smaller diameter surface of the hollow truncated cone faces the side of the baffle near the discharge port, and the larger diameter surface of the hollow truncated cone faces the side of the baffle near the feed port, so that the material moves from the larger diameter surface of the hollow truncated cone to the smaller diameter surface of the hollow truncated cone, resulting in smoother flow. Furthermore, the material enters from the larger diameter surface of the hollow truncated cone and exits from the smaller diameter surface of the hollow truncated cone, resulting in better uniform heating of the material.

[0011] According to another exemplary embodiment of the invention, the support block is a chromium support block. Chromium has poor thermal conductivity, which reduces the amount of heat transferred from the heating ring to the support block, thereby reducing the impact of heat on the hydraulic cylinder.

[0012] According to another exemplary embodiment of the invention, several of the support blocks are connected to heat-insulating beams, so that the heat from the heating ring does not easily pass through the heat-insulating beams, thereby reducing the impact of heat on the hydraulic cylinder.

[0013] According to another exemplary embodiment of the present invention, the heat insulation beam is a ceramic heat insulation beam. Ceramic has poor thermal conductivity, which reduces the amount of heat transferred from the heating ring to the heat insulation beam, thereby reducing the impact of heat on the base and the control box.

[0014] According to another exemplary embodiment of the present invention, the heat insulation beam is provided with rock wool, which has a high ignition point and can improve safety; in addition, the rock wool can insulate the heat insulation beam, reduce the heat dissipation from the heat insulation beam to the outside, thereby reducing the impact of the heat in the heat insulation beam on the base and control box; and can to a certain extent prevent the heat near the heating ring from passing through the heat insulation beam, thereby reducing the impact of the heat near the heating ring on the base and control box.

[0015] According to another exemplary embodiment of the present invention, the thickness of the silicon carbide coating is 7μm to 35μm. If it is too thin, it will lead to greater processing difficulty and poorer corrosion resistance, resulting in a shorter service life of the equipment; if it is too thick, it will result in poor thermal conductivity and higher cost.

[0016] According to another exemplary embodiment of the present invention, the thickness of the thermal barrier coating is 10μm to 20μm. If it is too thin, it will lead to greater processing difficulty and poor heat preservation effect; if it is too thick, it will lead to higher cost.

[0017] According to another exemplary embodiment of the present invention, the thickness of the boron nitride coating is 5μm to 15μm. If it is too thin, it will lead to greater processing difficulty and poor heat preservation effect; if it is too thick, it will lead to higher cost.

[0018] According to another exemplary embodiment of the present invention, the high-temperature alloy is a nickel-based high-temperature alloy.

[0019] According to another exemplary embodiment of the present invention, the heating temperature of the heating ring is 300°C to 1000°C.

[0020] According to another exemplary embodiment of the present invention, the heating temperature of the heating ring is 600°C to 1000°C.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The material is heated by the heating ring and the heating device inside the hollow truncated cone, which makes the heating uniformity better.

[0023] 2. The inner surface of the heating ring is coated with a silicon carbide coating. Both the inner and outer surfaces of the hollow truncated cone are coated with a silicon carbide coating. A boron nitride coating is also applied to the silicon carbide coating. Silicon carbide has stable chemical properties, high thermal conductivity, low coefficient of thermal expansion, and good wear resistance. It can prevent corrosion while reducing heat loss and extending service life. Boron nitride has chemical corrosion resistance and a high oxidation temperature. It can protect the inner silicon carbide layer and the heating ring from corrosion. It also has good thermal conductivity, resulting in less heat loss during heating.

[0024] 3. The outer surface of the heating ring is coated with a thermal barrier coating, which can prevent the heating ring from corroding at high temperatures. Since the thermal barrier coating has a low thermal conductivity, it can also keep the inside of the heating ring warm. Attached Figure Description

[0025] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of a corrosion-resistant high-temperature heating device.

[0027] Figure 2 This is a front view structural diagram of a corrosion-resistant high-temperature heating device;

[0028] Figure 3 A top view schematic diagram of a corrosion-resistant high-temperature heating device;

[0029] Figure 4 This is a schematic diagram of the hollow frustum inside the heating ring.

[0030] Figure 5This is a schematic diagram of the coating on the wall of the heating ring;

[0031] Figure 6 This is a schematic diagram of the coating on a hollow circular platform.

[0032] In the diagram: 1. Heating ring; 11. Feed inlet; 12. Discharge outlet; 13. Air outlet; 14. Hollow truncated cone; 15. Baffle; 2. Support block; 3. Heat insulation plate; 4. Hydraulic cylinder; 41. First hydraulic cylinder; 42. Second hydraulic cylinder; 43. Third hydraulic cylinder; 44. Fourth hydraulic cylinder; 5. Heat insulation beam; 6. Base. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation thereof.

[0034] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the figures.

[0035] According to an overall technical concept of the present invention, please refer to Figures 1-4 A corrosion-resistant high-temperature heating device includes: a heating ring 1, at least two hollow frustums 14 are provided inside the heating ring 1, heating devices are provided inside the heating ring 1 and the hollow frustums 14, a silicon carbide coating is provided on the inner surface of the heating ring 1, a silicon carbide coating is provided on the inner and outer surfaces of the hollow frustums 14, a boron nitride coating is also provided on the silicon carbide coating, and a thermal barrier coating is provided on the outer surface of the heating ring 1.

[0036] At least three support blocks 2 are provided below the heating ring 1, a heat insulation plate 3 is provided below the support blocks 2, and at least three hydraulic cylinders 4 are provided below the heat insulation plate 3.

[0037] It also includes a control box, which controls the output length of hydraulic cylinder 4.

[0038] In one embodiment, see Figures 1-4The feed inlet 11 is connected to the outlet of the storage box, and the discharge outlet 12 is connected to the inlet of the storage box. The output length of each hydraulic cylinder 4 is controlled by the control box at different times, so that the material can move from the feed inlet 11 to the discharge outlet 12 at a certain speed. During the movement, the material is mixed evenly, and the material is in uniform contact with the heating ring 1 and the hollow truncated cone 14, so that the heating uniformity of the material is good.

[0039] In this embodiment, the silicon carbide coating is prepared by physical or chemical vapor deposition, spraying, or other methods, such as ion sputtering or PECVD (Plasma Enhanced Chemical Vapor Deposition).

[0040] In this embodiment, the thermal barrier coating is prepared by physical or chemical vapor deposition, spraying, or other methods, such as ion sputtering or PECVD (Plasma Enhanced Chemical Vapor Deposition).

[0041] In this embodiment, the control box controls the output length of each hydraulic cylinder 4 at different times as follows: In the first stage, the output length of the first hydraulic cylinder 41 is zero, the output lengths of the second hydraulic cylinder 42 and the fourth hydraulic cylinder 44 are half of the maximum output distance, and the output length of the third hydraulic cylinder 43 is the maximum output distance; In the second stage, the output lengths of the first hydraulic cylinder 41 and the third hydraulic cylinder 43 are half of the maximum output distance, the output length of the second hydraulic cylinder 42 is zero, and the output length of the fourth hydraulic cylinder 44 is the maximum output distance; In the third stage, the output length of the first hydraulic cylinder 41 is the maximum output distance, the output lengths of the second hydraulic cylinder 42 and the fourth hydraulic cylinder 44 are half of the maximum output distance, and the output length of the third hydraulic cylinder 43 is zero; In the fourth stage, the output lengths of the first hydraulic cylinder 41 and the third hydraulic cylinder 43 are half of the maximum output distance, the output length of the second hydraulic cylinder 42 is the maximum output distance, and the output length of the fourth hydraulic cylinder 44 is zero; In the fifth stage, the state is the same as in the first stage, and this cycle continues. The duration of each stage can be one second or ten seconds, and this duration can be adjusted according to the actual situation.

[0042] In this embodiment, the maximum output distance of hydraulic cylinder 4 is the maximum distance that hydraulic cylinder 4 can output.

[0043] In this embodiment, the hollow frustum 14 can be a frustum with equal wall thickness or a frustum with unequal wall thickness.

[0044] In this embodiment, when heating the material, the material occupies 40% to 80% of the hollow volume inside the heating ring 1, which results in better mixing and heating.

[0045] In this embodiment, the storage bin contains materials that need to be heated.

[0046] In this embodiment, the base 6 raises the device higher off the ground, preventing the device from getting wet and extending its service life.

[0047] In this embodiment, the heating ring 1 is a high-temperature alloy heating ring. Since the high-temperature alloy has a high melting point, the heating ring 1 can withstand a high temperature. The high-temperature alloy has good thermal conductivity, which makes the heating ring 1 have high heating efficiency and low energy consumption.

[0048] In this embodiment, the high-temperature alloy heating ring is a nickel-based high-temperature alloy heating ring, specifically a nickel-based superalloy heating ring.

[0049] In this embodiment, the outer surface of the heating ring 1 is plated with a layer of chromium. Chromium has a high melting point, which can improve safety. In addition, chromium has poor thermal conductivity, which can reduce heat loss in the heating ring 1, thereby reducing energy consumption. Chromium's poor thermal conductivity can also reduce the impact of heat in the heating ring 1 on the base 6 and the control box.

[0050] In this embodiment, the top surface of the heating ring 1 is provided with an air outlet 13, and an exhaust pipe is provided on the air outlet 13. An exhaust fan is provided at the end of the exhaust pipe to facilitate the discharge of the gas generated during heating from the heating ring, and to avoid problems such as explosion caused by thermal expansion and contraction. It can also prevent the silicon carbide coating from reacting with oxygen at high temperatures to generate silicon dioxide and carbon dioxide, thereby causing the coating to lose its original function and reducing the heating efficiency of the device.

[0051] In this embodiment, the exhaust pipe is made of a high-temperature resistant metal or alloy, such as a high-temperature alloy.

[0052] In this embodiment, the length of the exhaust pipe is determined according to the actual situation, and is generally 0.1m to 5m.

[0053] In this embodiment, a cooling device is provided outside the exhaust pipe.

[0054] In this embodiment, the exhaust fan is a high-temperature resistant exhaust fan, such as the HTF exhaust fan manufactured by Shandong Wosk Air Conditioning Equipment Co., Ltd.

[0055] In this embodiment, the thickness of the silicon carbide coating is 15 μm.

[0056] In this embodiment, the thickness of the thermal barrier coating is 12 μm.

[0057] In this embodiment, the thickness of the boron nitride coating is 10 μm.

[0058] In this embodiment, the silicon carbide coating on the inner surface of the heating ring 1 and the silicon carbide coating on the inner and outer surfaces of the hollow frustum 14 are all the same.

[0059] In this embodiment, the inner diameter of the heating ring 1 is 0.3m to 1m.

[0060] In this embodiment, the outer diameter of the heating ring 1 is 0.5m to 2m.

[0061] In this embodiment, the inner diameter of the heating ring 1 is 0.2m to 1m.

[0062] In this embodiment, the top surface of the heating ring 1 is provided with a feed inlet 11, the bottom surface of the heating ring 1 is provided with a discharge outlet 12, and a baffle 15 is provided between the feed inlet 11 and the discharge outlet 12 to facilitate simultaneous feeding and slag discharge, thereby improving the heating efficiency of powdery materials; the baffle 15 enables the material to move in a set direction, resulting in better uniformity of final material heating.

[0063] In this embodiment, the smaller diameter surface of the hollow frustum 14 faces the side of the baffle 15 near the discharge port 12, and the larger diameter surface of the hollow frustum 14 faces the side of the baffle 15 near the feed port 11. This makes the material flow from the larger diameter surface of the hollow frustum 14 to the smaller diameter surface of the hollow frustum 14, resulting in smoother flow. Furthermore, the material enters from the larger diameter surface of the hollow frustum 14 and exits from the smaller diameter surface of the hollow frustum 14, which improves the uniformity of material heating.

[0064] In this embodiment, the support block 2 is a chromium support block. Chromium has poor thermal conductivity, which reduces the amount of heat transferred from the heating ring 1 to the support block 2, thereby reducing the impact of heat on the base 6 and the control box.

[0065] In this embodiment, the support block 2 is connected to the heat insulation beam 5, which makes it difficult for the heat from the heating ring 1 to pass through the heat insulation beam 5, thereby reducing the impact of heat on the hydraulic cylinder 4.

[0066] In this embodiment, the heat insulation beam 5 is a ceramic heat insulation beam. Ceramic has poor thermal conductivity, which reduces the amount of heat transferred from the heating ring 1 to the heat insulation beam 5, thereby reducing the impact of heat on the base 6 and the control box.

[0067] In this embodiment, the control box is installed inside the base 6, saving space.

[0068] In this embodiment, the heat insulation plate 3 is a ceramic heat insulation plate. Ceramic has poor thermal conductivity, so less heat is transferred from the heating ring 1 to the heat insulation plate 3, thereby reducing the impact of heat on the base 6 and the control box.

[0069] In this embodiment, the ceramic can be either zirconia ceramic or alumina ceramic.

[0070] In this embodiment, rock wool is provided on the outside of the heat insulation beam 5. Rock wool has a high ignition point, which can improve safety. In addition, rock wool can insulate the heat insulation beam 5, reduce the heat dissipation from the heat insulation beam 5 to the outside, thereby reducing the impact of the heat in the heat insulation beam 5 on the base 6 and the control box. It can also prevent the heat near the heating ring 1 from passing through the heat insulation beam 5 to a certain extent, thereby reducing the impact of the heat near the heating ring 1 on the base 6 and the control box.

[0071] In this embodiment, the heating devices in the heating ring 1 and the hollow frustum 14 are electric heating devices, that is, heating is achieved by arranging heating wires or other methods in the heating ring 1 and the hollow frustum 14. Electric heating has several advantages, including high thermal efficiency. Compared to other energy sources, coal has a thermal efficiency of approximately 12-20%, liquid fuels approximately 20-40%, gaseous fuels approximately 50-60%, and steam approximately 45-60%, while electricity has a thermal efficiency of approximately 50-95%. Electric heating also offers rapid heating, generating a large amount of heat within a small area to quickly reach the desired temperature. Furthermore, it provides high heating temperatures, reaching several thousand degrees Celsius in some applications, making it suitable for a wide range of situations. Electric heating is highly controllable, easily enabling automatic and remote temperature control. It does not require specific ambient conditions, as it does not rely on oxygen, thus reducing the risk of oxidation. Compared to other heating methods, electric heating is environmentally friendly, producing less residue and soot, while maintaining the cleanliness of the heated object. Finally, it features low thermal inertia, uniform heating, and the ability to achieve overall or localized heating with high temperature control precision.

[0072] In this embodiment, the heating temperature of heating ring 1 is 1000℃.

[0073] In this embodiment, the contact surface between the support block 2 and the heating ring 1 is arc-shaped, which makes the contact area between the support block 2 and the heating ring 1 larger, thereby making the heating ring 1 more stable.

[0074] In this embodiment, the radius of the arc-shaped contact surface between the support block 2 and the heating ring 1 is equal to the outer diameter of the cross-section of the heating ring 1, which further increases the contact area between the support block 2 and the heating ring 1, making the heating ring 1 more stable.

[0075] In this embodiment, the heat insulation beam 5 and the heating ring 1 are parallel, and the heat insulation beam 5 is evenly distributed around the center of gravity of the heating ring 1, so that the support of the heat insulation beam 5 on the heating ring 1 is relatively balanced, and the heating ring 1 has good stability.

[0076] In this embodiment, the shape of the heat insulation beam 5 is similar to that of a ship's rudder.

[0077] In this embodiment, the heat insulation beam 5 is covered with heat insulation material, which makes the heat insulation effect of the heat insulation beam 5 better.

[0078] In this embodiment, the heat insulation beam 5 has a circular cross-section, which makes the heat insulation beam 5 more resistant to breakage, thereby making the heat insulation beam 5 have a longer service life.

[0079] In this embodiment, a filter device is provided on the air outlet 13, making the discharged gas more environmentally friendly.

[0080] In this embodiment, there are 11 hollow frustums 14.

[0081] In this embodiment, there are 12 support blocks 2.

[0082] In this embodiment, Figure 5 In the diagram, a represents the thermal barrier coating; b represents the wall surface of heating ring 1; c represents the silicon carbide coating; and d represents the boron nitride coating.

[0083] In this embodiment, Figure 6 In the middle, e represents the wall surface of the hollow frustum 14.

[0084] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant high-temperature heating device, characterized in that, include: A heating ring (1) is provided with at least two hollow frustums (14) inside the heating ring (1). Heating devices are provided inside the heating ring (1) and the hollow frustums (14). A silicon carbide coating is provided on the inner surface of the heating ring (1). A silicon carbide coating is provided on both the inner and outer surfaces of the hollow frustums (14). A boron nitride coating is also provided on the silicon carbide coating. A thermal barrier coating is provided on the outer surface of the heating ring (1). At least three support blocks (2) are provided below the heating ring (1), a heat insulation plate (3) is provided below the support blocks (2), and at least three hydraulic cylinders (4) are provided below the heat insulation plate (3); It also includes a control box that controls the output length of the hydraulic cylinder (4).

2. The corrosion-resistant high-temperature heating device according to claim 1, characterized in that, The heating ring (1) is a high-temperature alloy heating ring.

3. The corrosion-resistant high-temperature heating device according to claim 1, characterized in that, The top surface of the heating ring (1) is provided with an air outlet (13), the air outlet (13) is provided with an exhaust pipe, and the end of the exhaust pipe is provided with an exhaust fan.

4. The corrosion-resistant high-temperature heating device according to claim 1, characterized in that, The heating ring (1) has a feed inlet (11) on its top surface and a discharge outlet (12) on its bottom surface. A baffle (15) is provided between the feed inlet (11) and the discharge outlet (12).

5. The corrosion-resistant high-temperature heating device according to claim 4, characterized in that, The smaller diameter surface of the hollow frustum (14) faces the side of the baffle (15) near the discharge port (12), and the larger diameter surface of the hollow frustum (14) faces the side of the baffle (15) near the feed port (11).

6. The corrosion-resistant high-temperature heating device according to claim 1, characterized in that, The support block (2) is a chromium support block.

7. The corrosion-resistant high-temperature heating device according to claim 1, characterized in that, Several of the support blocks (2) are connected to heat-insulating beams (5).

8. The corrosion-resistant high-temperature heating device according to claim 7, characterized in that, The heat insulation beam (5) is a ceramic heat insulation beam.

9. A corrosion-resistant high-temperature heating device according to claim 7 or 8, characterized in that, The heat insulation beam (5) is covered with rock wool.

10. The corrosion-resistant high-temperature heating device according to claim 1, characterized in that, The thickness of the silicon carbide coating is 7 μm to 35 μm.

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